Wow, I haven’t been able to find this game in years. It’s a little Flash game (which don’t work in a lot of browsers these days) where you draw a line across to a door so you can get a key.
I found it for back when he was 5 years old and he made many papergame versions of it through the years since. Never could find the original but this was it.
[responsivevoice_button voice="US English Male"]